[GreenKeys] 28 Tape Printer questions

[Nick England]

With no loop current, it'll run open and spit out blank tape.
Motor relay is probably for auto-start when signal line opens?

Lamp - Teletype Part 1515162  also known as 6S6DC/120V
S6 bulb, 6 watts, Double Contact BA15D base, 120v filament
http://www.bulbtown.com/6S6DC_120V_MINIATURE_BULB_BA15D_BASE_p/40804.htm

or perhaps at your local hardware store which has an assortment of S6 bulbs.



Nick England K4NYW
www.navy-radio.com

On Sun, Sep 6, 2015 at 9:36 PM, Paul Heller <paul0926 at comcast.net> wrote:

> Greetings.
>
> I’m nearly finished reconditioning a 28 Tape Printer and have a few
> questions:
>
> 1. I need a bulb. I believe this is referred to as a two contact bayonet
> style socket (?). Does anyone know the bulb number?  I’d like to get one
> and perhaps an extra.  I measure 120V AC across the contacts.. There was a
> GE1314X in there that blew immediately. Somebody up the line somewhere must
> have replaced the bulb and never powered the unit up. When I searched the
> internet, the 1314X is rated for 12V so no wonder….
>
> 2. There is a relay in the LESU that trips at about 12V DC and sends power
> to the motor. It was wired to a terminal strip in the base. Any idea how
> this was used in service?  I’ve bypassed it, but curious how it would have
> been energized in operation.
>
> 3. I had the LESU upside down while I was tracing the wiring trying to
> figure out why the motor would not turn on (that’s how I found the relay).
> In the upside down position the motor runs and that is all. When I turn the
> LESU upright, the motor still runs but now the unit chatters and spits out
> tape (nothing on the tape except the newly formed sprocket holes). The tape
> printer is not hooked up to a loop yet. Is this normal, or might something
> else (polar relay?) be bad?
>
> Thanks for any advice.
>
> Paul
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